From: "J. Bruce Fields" <bfields@xxxxxxxxxx>
fi_delegees is basically just a reference count on users of
fi_deleg_file, which is cleared when fi_delegees goes to zero. The
fi_deleg_file check here is redundant. Also add an assertion to make
sure we don't have unbalanced puts.
Signed-off-by: J. Bruce Fields <bfields@xxxxxxxxxx>
---
fs/nfsd/nfs4state.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index 1bdfefe2e6ec..1a0b38fddde4 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -849,9 +849,12 @@ static void nfs4_put_deleg_lease(struct nfs4_file *fp)
{
struct file *filp = NULL;
+ WARN_ON_ONCE(!fp->fi_delegees);
+
spin_lock(&fp->fi_lock);
- if (fp->fi_deleg_file && --fp->fi_delegees == 0)
+ if (--fp->fi_delegees == 0) {
swap(filp, fp->fi_deleg_file);
+ }
spin_unlock(&fp->fi_lock);
if (filp) {
--
2.14.3
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